Gas burner



Nov. 13, 1934. T. A. COLEMAN GAS BURNER Filed Aug. 10, 1933 PatentedNov. 13, 1934 UNITED STATES PATENT oF-FIcE.

GAS BURNER Thomas A. Coleman, Carbondal'e, Pa. Application August 10,1938, Serial No. 684,584 1 claim. (01. 158-116) The device forming thesubject matter of this application is a burner, capable of beingemployed on cook stoves that use gas, although not confined to thatparticular structure. The in- U vention aims to provide novel means fordelivering the mixture of gas and primary air to the outlets wherecombustion takes place. Another object of the invention is to improvethe rib construction that defines the burner outlet.

It is within the province of the disclosure to improve generally and toenhance the utility of devices of that type to which the inventionappertains.

With the above and other objects in view, 16 which will appear as thedescription proceeds,

the invention resides in the combination and arrangement of parts and inthe details of construction hereinafter described and claimed, it

. being understood that changes in the precise embodiment of theinvention herein disclosed, may

be made within the scope of what is claimed, without departing from thespirit of the invention.

In the accompanying drawing:

Fig. l is a top plan of the body of the device;

Fig. 2 is a vertical longitudinal section;

Fig. 3 is a top plan of the tubular inner member;

Fig. 4 is a side elevation of the tubular inner member.

The device is made of any desired metal or metals and includes a tubularbody 1. The body 1 is provided at one extremity with a down turned end2. The end 2 need not be located as shown and described. It can bearranged in any desired manner. On the lower extremity ofthe part 2there is an enlarged bell 3 having a bottom 4 in which is mounted anupwardly extended gas nozzle 5 located within the bell 3. The bottomvalve 7, which may be a rotary, disk-like valve, held at 8, by a screw,or otherwise, on the lower end of the bell 3, for rotary adjustment. Thegas enters by way of a pipe 9 having its upper end mounted in the nozzle5. A valve 10, under the control of an operator, is interposed in thepipe 9.

Formed integrally with the inner end of the body 1 is an enlarged,vertical, tubular casing 11. The inlet that leads from the body 1 to thecasing 11 is marked by the numeral 12. Opposite to the body 1, thecasing 11 has an outstanding supporting finger 14. An invertedfunnel-shaped secondary air inlet 15 is formed integrally with thecasing 11, at the lower end thereof, and ex- .casing 11.

4 of the bell 3 has air inlets 6 controlled by a tends upwardly withinthe casing 11 to a point a little above the axis of the body 1. Thecasing 11 has an internal, parti-circumferential rib 16, disposed abovethe inlet 12, and overhanging the inlet, the rib projecting into thecasing 11. The 0 casing 11 terminates in a funnel shaped, flared top1'7.

A tubular.inne'r member 18 is located in the The tubular inner member 18has an annular base 19, threaded at 20 into the secondary air inletmember 15 of the casing 11. The inlet member 18 has an upwardly flaredintermediate portion 21 terminating in a flared annular head 22 disposedin the'top 17 of the casing 11, in parallel relation thereto. Downwardlyextended ribs 24 are joined integrally to the head 22 as shown at 23.There are grooves or combustion orifices 25 between the ribs 24. Thegrooves- 25 may be of any desired shape. Preferably they are -V-shaped,as shown at 27. The lower ends of the ribs 24 may be pointed, as shownat 26.

The inner tubular member 18 is supplied with internal bosses 28 locatedat the place 29 where the head 22 joins the intermediate portion 21 ofthe member 18. In the bosses 28 there are downwardly and outwardlyinclined gas inlet ports 30 discharging at their inner ends within thehead 22, and communicating, at their outer ends, with the space betweenthe casing 11 and the intermediate portion 21 of the inner member 18.

The numeral 31 marks a stove top or the like, having an opening 32, thewall of which is spaced from the funnel-shaped top 1'? of the casing 11.

The general operation of a burner of the kind shown and described iswell understood by those skilled in the art. The gas enters the body 1by way of the pipe 9 and the nozzle 5, under the governance of the valve10. The valve '7 regulates the primary supply of air through the inlets6. The mixture of gas and primary air proceeds to the inlet 12, and hereenters the space between the inner member 18 and the casing 11.' At thispoint an important operation takes place. The member 15, beingfunnel-shaped, or coneshaped, tends to direct the mixture of gas andprimary air upwardly, but the rib 16 prevents the mixture from flowingupwardly, in too greata measure, directly through the grooves 25 thatare immediately above the inlet 12. The result is that the primarymixture of gas and air is distributed fairly and evenly to all of thegrooves 25, and this is especially true, in view of the fact that theintermediate portion 21 of the inner member 18 has an outward and upwardflare. The delivery of the mixture of primary air and gas,

through the grooves 25, is facilitated because the ribs 24 are pointedat their lower ends, as shown at 26, and a fine and even distribution isefiected because the grooves 25 are pointed at their upper ends, asshown at 27, where the said grooves open through the rim or bead ,23.The specific construction of the ribs and grooves alluded to is highlyuseful, but it is not insisted upon.

The purpose of the gas ports 30 in the member 18 is to make the burnerflame impinge on the middle part of the cooking utensil (not shown)which is above the burner. The secondary air, delivered through theinlet 15 and the member 18, keeps the member 18 cool and at the sametime, the cooking utensil is heated evenly and thoroughly. There is anupward flow of air through the opening 32, in the general direction ofthe flame.

The grooves 25 are spaced apart to permit secondary air to. circulatethrough the flame, which is an advantageous feature in the burner, sinceit aids combustion.

Having thus described the invention, what is claimed is:

In a device of the class described, a tubular body provided at one endwith controlled means for the admission of gas and primary air, the bodybeing provided at its opposite end with an enlarged tubular casingarranged approximately at right angles to the body, there being an inletwhere the body and the casing are joined together, the casinghaving aflared top and having an inverted funnel-shaped secondary air inletmember at its lower end, located within the casing and in the path ofthe mixture of gas and primary air enteringthe casing by way of thefirst-specified inlet; and a tubular inner member in the casing andhaving its lower end mounted on the upper end of the secondary air inletmember, said tubular inlet member including an upwardly flaredintermediate portion and an upwardly flared top, there being ribsbetween the top of the inner member and the flared top of the casing andforming combustion orifices, the easing being provided with-animperforate particircumferential internal rib located directly above thefirst-specified inlet and projecting toward the intermediate portion ofthe tubular inner member,

the internal rib overhanging a portion of the funnel-shaped secondaryair inlet member, the internal rib being located betweenthe'first-specified inlet and the combustion orifices that areimmediately above said inlet, all portions of said internal rib beingdisposed approximately at right angles to the axis of the funnel-shapedair' inlet member.

THOMAS A. COLEMAN.

